Lindsay Lohan shocked fans on the season finale of her reality TV show Sunday night, revealing she recently suffered a miscarriage.

While explaining why she missed days of shooting her OWN documentary series, "Lindsay," the 27-year-old said: "No one knows this — I had a miscarriage for those weeks that I took off."

"I couldn't move, I was sick," the troubled star said. "Mentally, that messes with you."

Lohan did not disclose the identity of the father or how far along in the pregnancy she was but she did say the crisis was hinted at in a previous episode of the show when she couldn't leave her room, and it was announced "she doesn't want to come down."

"Watching this series, I just know how I felt at that moment and I can relate to that girl, which sounds kind of crazy," Lohan said. "But I'm like, 'Oh my god, this is really sad. Who's helping her?' "

News of her miscarriage comes days after Lohan confirmed a rumored "sex list" was real. Lohan told Andy Cohen on the Bravo show "Watch What Happens Live," it was part of her Alcoholics Anonymous recovery process.

"I'm going to get serious for a second. That was actually my fifth step in AA at Betty Ford," she told Cohen.

"Someone, when I was moving during the OWN show, must've taken a photo of it," she said. "So that's a really personal thing and it's really unfortunate."